Process of producing threads from viscose



4 bath will consist in one kilogram water, 631. stantially one thousand (1000 arts by Patented oct'. 25, 1927. I, I

f warren star CHARLES A. HUTTINGEB, OF LAKEWOOD, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE ACME RAYON CORPORATION, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

PROCESS OF PRODUCING THREADS FROM VISCOSE. No Drawing. Application filed August 14, 1922. Serial No. 581,883.

My invention relates to processes of protheory is that the extraordinary softness ducing lustrous threads, etc., from viscose. and openness is occasioned by the following .45 This invention contemplates the production physical action of the sugar while the fila of a very soft and open thread. The invenments are setting in the precipitating bath. 5 tion relates particularly to the composition The sugar exteriorly coats the several of the bath in which the viscose is re-genstrands of the viscose while the same is seterated into cellulose hydrate. ting, possibly somewhat analogous to .the The following description sets forth in coatingof flour on a rolling board whereby detail certain steps illustrating the method the dough is prevented from sticking, so 10 ofcarrying out my invention, such disclosed that the multiplicity of strands,-from ten steps constituting, however, but one of the to sixty or more, according to the thread various ways in which the principle of the produced,-do not stick or closely adhere invention may be utilized. when being twisted. This coating of sugar- In carrying out my improved process, 1 is washed off in the usual water washing l5 utilize a precipitating bath in the presence after the skein is formed and the resultant of a. certain proportion of sugar. Also, 1 product is the very soft and open thread may incorporate the sugar with the precipiwhich has been mentioned. By the time tating bath. The proportion by weight of the coating of sugar has been washed 01f, sugar may be from five to twenty per cent the filaments have so hardened that they 2 but I have found that from sevento ten per Will-not closely adhere.

cent gives the best results. a What I claim is:

The precipitating bath, in addition to the 1. In the process of producing threads sugar, consists of an aqueous solution of a from viscose, the steps which consist, in semi-neutral sulfate salt and preferably of an introducing the latter in multiple streams aqueous solution of sodium bisulfate because into a precipitating bath composed of subthe latter is a byproduct which can be stantially ten (10) parts by'weight water, bought comparatively cheaply. The relasix (6) parts sodium bisulfate, and one and 7 tive proportions which I use are substanone-half (1 parts sugar; and then spintially ten (10) parts by weight water, six ning the resultant filaments, whereby a soft 30 (6) parts bisulfate, and one and one-half and open thread is obtained.

(1%) parts sugar. I preferably utilize 2. In the process of producing threads common granulated sugar, other factors, from viscose, the steps which consist, in such as price, availability, etc., being equal. introducing the latter in multiple streams The exact proportions of a very satisfactory into a precipitating bath composed of subgrams sodium bisulfate and 164 grams comweight water; six hundred an t irty-one mon granulated sugar. (631) parts. sodium bisulfate, and one hun- The thread'obtained by spinning the muldred and sixty-four (T64) parts'granulated tiple filaments of cellulose hydrate preci isugar; and then spinning the resultant fila-- tated by a bath of the character disclose is ments, whereby a soft and open thread is a product which has the necessary'qualities obtained. as regards luster, strength and elasticit Signed lg me, thls 27thda of Jul 1922. and is also unusually soft and open.' y HARLES A. H TTIN ER. 

